.den {
	position: absolute;
	width: 150px;
	height: 150px;
	top: 50%;
	left: 50%;
	margin: -75px 0 0 -750px;
	text-align: center;
	color: red;
}

body {
	background: url("/RPG/image/tanxian/miwusenlin/fangdongzuo.png");
	background-size: 100% 100%;
	background-attachment: fixed;
}